diff --git a/pyproject.toml b/pyproject.toml
index 1cc09d3..772bcf4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
 
 [project.optional-dependencies]
 test   = [
-    "pytest==8.3.5; python_version < '3.10'",
+    "pytest==8.4.2; python_version < '3.10'",
     "pytest==9.1.1; python_version >= '3.10'",
     "pandas==2.3.3; python_version < '3.11'",
     "pandas==3.0.3; python_version >= '3.11'",